Happy Flower is a badge in Paper Mario and Paper Mario: The Thousand-Year Door. In Paper Mario, it can be found in Flower Fields, obtained by hitting a trio of trees to the east of the entrance with Mario's hammer in the order of middle, right, left, and can be bought from Merlow for eight Star Pieces. In Paper Mario: The Thousand-Year Door, it can bought from the Lovely Howz of Badges for 150 coins and potentially dropped by Koopa Troopas, Paratroopas, Crazee Dayzees, and Amazy Dayzees. Its effects differ slightly between games: in Paper Mario, the badge heals Mario for one FP at the end of every turn if he equips it, and equipping multiple copies of it increases the number of FP it heals incrementally; in Paper Mario: The Thousand-Year Door, equipping the badge gives Mario chance of being restored one FP by Happy Flower at the end of every turn, and equipping multiple copies of the badge increases both the amount of restored FP and the chance of any amount of FP being restored, though the chance of getting the higher amounts of FP restored becomes rarer as more badges are equipped.

"I see...a Happy Flower Badge. There is a child upstairs in the fortune-teller's house on Shooting Star Summit. Hey! I'm that fortune-teller! Anyway, the child is my brother, Merlow. He will trade Star Pieces for Badges. Head upstairs to see him!"

"I see...a Happy Flower Badge. You hit the three pink trees that are standing together in Flower Fields. You first hit the middle, then the right and then the left. The Badge falls like a leaf."

"Hey, Super Star! Lemme fill you in on something! You can get yourself one fine gift if you hit the three trees in a row in this order: left, right, then middle. Yup. Hee hee hee... It's true! I swear! Oops, I've told you too much! No more secrets out of me!"